NEW YORK (

TheStreet

) -TheStreet Ratings' stock model upgraded

AECOM Technology Corporation

(ACM) - Get Report

to 'Buy' from 'Hold'. Net income at this $3.3 billion market cap, management support provider improved 25% to $67.8 million in the fiscal fourth quarter compared to a profit of $54.3 million in the same quarter last year.

TheStreet Ratings released rating changes on 11 U.S. common stocks for December 22, 2010. In total, eight stocks were upgraded and three stocks were downgraded by our stock model.

In the fourth quarter, AECOM reported $1.83 billion in revenue, an increase of 12% over the year earlier quarter. Learn more about AECOM Technology Corporation:

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$890 million market cap, greeting card manufacturer,

American Greetings

(AM) - Get Report

was upgraded to 'Buy' from 'Hold'. In third quarter results, American Greetings reported a 2% decline in revenues to $422 million. Despite the decrease in revenues, net income was up 8.3% to $32.2 million compared to the same quarter last year. Learn more about American Greetings:

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-- Reported by Chris Stuart in Boston, MA.

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Chris Stuart, CFA, equity research manager, joined TheStreet.com Ratings after working as a senior investment analyst with Merrill Lynch, covering Small Cap Equity and Alternative investment strategies. Prior to that, Chris gained analytical and investment experience, working for One Beacon Insurance as an Actuarial Analyst, and H&R Block as a Financial Advisor. He earned his Bachelor's degree in Finance from the University of Massachusetts Amherst. He holds a Chartered Financial Analyst (CFA) designation, and is a member of the Boston Security Analysts Society (BSAS) and the CFA Institute.